Start trapping the area where the back group spawns, then run to the popup trigger area and head back towards your traps.

The monsters will probably be dead by the time you get there.

Start trapping the second area, on the left side of the doorway.

Right as the first spirit dies, take a shot at the closest hopping vampire to agro the entire group. WALK backwards towards your traps, and get behind the remaining spirit. If you turn around and run, the vampires will most likely break agro.
If done correctly, the mob will ball up at the remaining spirit. Before they can use any suicide skills, they will start getting hit by the traps and knockdowns.

Pick up your stuff and enjoy the XP.



